What about Tress MacNeille?
She's great as Dot Warner and Babs Bunny!
But back to The Simpsons. I liked the earlier shows where they didn't focus all the secondary characters into one show. You have classic episodes where the family gets a pool and Bart gets injured leaving Lisa to become popular but that leads Bart to spy on Ned Flanders and him thinking Ned has killed his wife.
Or the episode where Homer goes to Moe's (as always) and creates a new drink called the Flaming Moe, which leads Moe to use the idea as his own and his place becomes really popular.
Or the episode where Homer needs money and is forced to go to Patty and Selma for money and they make him do favors.
Or the episode where Bart and Lisa take a test, leading Bart to realize he can be in law enforcement therefor enforcing law and being the hall monitor in the elementary school, while Lisa is upset about her poor test scores and stops doing her school work and rebels at school (doing Bart's old job).
Or the classic Kamp Krusty episode where Bart and Lisa go to Kamp Krusty and start to work making things.